Abstract: An electric skillet or the like cooking vessel includes a cooking pan and a removably attachable insulative handle having a temperature control assembly with a spring loaded temperature sensing "shoe". One portion of the side wall of the pan defines a raised temperature sensing area against which the "shoe" is pressed upon joining the pan and handle. A lip extends from the raised area and forms a recess between the lip and sidewall of the pan. A first end of a torsion spring mounted on the handle for rotation is received in the recess for engagement with the lip subsequent to joining the handle and pan and rotating the spring to a first, locked position. The opposite end of the spring is received beneath a shoulder provided on the handle, thereby twisting the torsion spring to cause the first end thereof to forcibly engage the lip.

Abstract: A unique core for an electrical transformer and method of construction thereof is disclosed which is applicable to either shell-form or core-form transformers of either single-phase or multi-phase application. The cross sectional area of the outside core leg and a portion of the yoke outside the electrical coil of the transformer is increased thereby decreasing the magnetic induction of that portion of the core with a concomitant reduction in electrical losses and noise. The structure comprises leg and yoke stacks formed of lamina of grain-oriented steel that are stacked in a laminar relationship such that adjoining edges of the leg and yoke members are periodically overlapped to enhance flux transfer. The core is stacked in such a fashion such that the outside leg members (outside the electrical coil) have additional laminar members periodically interspersed so that there are more outside leg lamina than inside leg lamina thereby increasing the cross-sectional area of the outside legs.

Abstract: A switchgear assembly which includes a vacuum interrupter, a current transformer, and a capacitive voltage sensor, all embedded within a cast epoxy housing mounted to a solidly grounded support structure. The voltage sensor includes a first capacitor, which is formed by an interrupter conductor stud, a plate, and the cast epoxy disposed therebetween, and a second capacitor, which is connected between the plate and a metal tube extending outside the housing. The tube is connected to ground through a conductive coating, applied to the housing, having an impedance which is very low in comparison to the impedance of the first capacitor.

Abstract: A protective device for electrical power distribution equipment includes a removable fuse holder and an integral load switch. The protective device may be affixed to a grounded metal enclosure, such as an oil-filled transformer, into which the protective device extends. The fuse holder may be removed from the protective device for checking or replacement with a minimal opening into the enclosure into which the protective device extends. A suitable load switch actuator is provided for controlling current flow through a fuse in the fuse holder. This load switch actuator also provides an interlock arrangement to prevent removal of the fuse holder from, as well as insertion of the fuse holder into, the protective device unless the load switch is open, thus ensuring that interruption and initation of current flow through the fuse in the removable fuse holder is controlled by the load switch.

Abstract: An apparatus for processing an electrical apparatus, such as a capacitor, containing a polymeric dielectric material. The interior of the capacitor casing, which is at room temperature, is initially connected to a vacuum source to evacuate the interior of the casing and when a vacuum sensing unit indicates that the required vacuum has been obtained, a degassed dielectric liquid is supplied to the interior of the casing. A positive pressure is applied to the liquid in the casing to fully impregnate the polymeric layer. When the desired capacitance is obtained, the impregnation is complete and the unit is sealed.

Abstract: An evaporative cooler having a one-piece, frameless shell secured to a bottom pan and having a top cover hinged along one edge to the side wall of the housing shell. A quick-release latching mechanism secures the top cover to the opposite side wall to hold the top cover closed while permitting the top cover to be easily opened for access to components of the evaporative cooler housed therein. Evaporative media pad assemblies have side frame members having V-shaped outer surfaces which slide in correspondingly shaped tracks in the corners of the shell to space the pad assemblies from the louvered side walls of the shell and permit the pad assemblies to be installed and removed from above with a vertical sliding movement.

Abstract: An adjustable light fixture recessible in a ceiling for directing light at various angles includes a housing with a lamp assembly mounted therein. The lamp assembly comprises a reflector having a conventional bulb socket attached pivotally to a plate having spaced apertures. Resilient tracks, mounted at one end to the base of the housing are received in the apertures provided in the plate, rendering the plate slidable along such tracks. The tracks are each provided with a series of protrusions engagable with rollers each of which are mounted on the plate adjacent the spaced apertures to form a series of overcenter arrangements whereby the position of the plate and the lamp assembly may be adjusted. Stops are provided at the free end of each track to limit the movement of the lamp assembly therealong. However, the stops may be bypassed to permit complete removal of the lamp assembly from the housing.

Abstract: A lighting unit comprising a lamp and a reflector provides high intensity, high efficiency, even illumination over an area of particular shape and size and has a cut-off angle which enables a person to approach close to the lighting unit without seeing the lamp or its reflection. The reflector comprises at least two spaced apart curved reflector surfaces which join each other along an edge line in a plane behind and spaced from the lamp. Points on the curve line of each reflector surface are spaced progressively further away from the lamp than the edge line. Some points on the curve are located on the side of the plane remote from the lamp. The lighting unit, which may employ reflector surfaces in addition to those above mentioned, may be employed in systems wherein it projects light upwardly for downward reflection from a ceiling or projects light downwardly directly onto a work surface.

Abstract: Apparatus for continuously lubricating a conveyor belt with a mixture of water and soap or detergent during normal operation and for washing the conveyor belt during a preselected time interval after normal operation has ceased. Solenoid valves are interposed in water lines to a lubricating nozzle and wash nozzles to control the flow of water to the nozzles, and pumps are provided to inject soap or detergent into each of the water lines. During normal conveyor operation, electrical power is supplied only to the lubricating line solenoid valve and the lubricating line pump to produce a lubricating spray of water and soap or detergent from the lubricating nozzle which is directed onto the belt. When the master on-off switch is switched to the "off" position, a wash timer is actuated for a predetermined interval of time and cooperates with a relay to also enable the wash line solenoid valve and the wash line pump to deliver water and soap or detergent to the wash nozzle for cleansing the conveyor belt.

Abstract: A miniature plug-in fuse assembly is provided in which a pair of conductive legs and a fuse link interconnecting them are integrally formed from fusible metal. An insulating casing wholly encloses the fuse link and a portion of the conductive legs, the casing having a hollow body with a cover which does not extend beyond the body in its longer dimension. The cover is secured to the body by a retaining arrangement employing the ends of the conductive legs, which also provides for the insertion of a test current to test the fuse link. Other ends of the legs extend through the body to provide plug-in members. The legs are fastened to the body by protruding lugs on the plug-in members and projecting stops on the portion of the legs in the casing. A method for making the fuse assembly of this invention involves a series of die stamping steps to form the legs and fuse link from a continuous strip of fusible metal and mounting the legs and fuse link in the casing.

Abstract: A trip indicator circuit for a circuit interrupter of an electric power system, which includes an electromagnetic status indicator, having an indicator which is movable between an indicating position and a non-indicating position, a pulse-actuated set coil for moving the indicator to the indicating position, and a pulse-actuated reset coil for moving the indicator to the non-indicating position. An indicator set circuit for energizing the set coil is connected across the trip coil by an electronic switching device which is rendered conductive by an overcurrent sensing circuit whenever a particular abnormal condition occurs in the electric power system, so that the set coil will be energized only when the circuit interrupter is tripped during the occurrence of the particular abnormal condition. A reset circuit is connected across the closing coil to energize the reset coil each time the circuit interrupter is closed.

Abstract: A control circuit useful in commercial cooking appliances, such as deep fat fryers, having electric heating elements and separate operating and safety controls including full power transmitting contactors for independently energizing and/or deenergizing the heating elements. The simplified control is economical, but reliable, and utilizes the safety control contactor connected in series power circuit with the heating elements and a single relay to establish both an on operating circuit for normal cooking conditions where the operating control cycles on and off to maintain the desired operating temperatures and a safety circuit that deenergizes all heating elements should an overheat condition occur and further that requires manual release or reset to again render the appliance operative.

Abstract: An improved electric cooking appliance such as a hot plate, range or griddle, particularly for use in a commercial countertop application. This class of appliance has a case supporting an electric heating element and the space between the heating element and the bottom of the case is limited because of the height restrictions of the counter type appliance. The improved appliance has a baffle extending across the entire breadth of the case below the heating element and separating the case into the heating element compartment on the upper side of the baffle and the control compartment located on the lower side. The controls including a switch or the like are located in the lower compartment and thereby are separated from the heating element by this baffle. Both the heating element compartment and the control compartment are provided with openings in the case at opposite sides of the compartment to allow convective airflow cooling of the compartment.

Abstract: A toaster chassis assembly for supporting heating element cards in an upstanding position in parallel relation, to define a bread-receiving slot therebetween, includes a horizontal base and end walls extending vertically upwardly from opposite ends of the base. The base defines a plurality of spaced slots for receiving tabs formed along the lower edges of the heating element cards for mounting the cards between the end walls and a plurality of tabular hooks extending from the base. Wire bread guards each comprising a plurality of vertical elements and an upper and lower horizontal element to form a grid, are mounted adjacent to the heating element cards to prevent engagement of bread slices being toasted with the heating element cards. The lower horizontal elements of the wire bread guards are received in the tabular hooks and the upper horizontal elements are received in slots formed along the upper edges of the end walls for supporting the bread guards.

Abstract: A built-in well type food warmer includes a heating element assembly which is separably engaged with the underside of a food well by adjustable hanger members. The heating element assembly includes an upper heat distribution plate which is nestable within a recess formed in the bottom of the food well. The heating element assembly is enclosed by a tray member which is resiliently mounted within an enclosure. Brackets extending outwardly from the enclosure are attached to the lower ends of baffle hangers which extend downwardly from an upper rim of the food well. The hangers are formed of two separable members, adjustably connected together for selectively adjusting the length of the hanger. As the hangers are shortened, the heating element assembly is resiliently biased into contact with the bottom surface of the food well within a recessed portion thereof.